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Nano modified material for efficiently adsorbing gaseous element mercury and preparation method thereof

A technology of gaseous elements and modified materials, which is applied in the field of adsorption materials, can solve the problems of lack of adsorption materials for gaseous element mercury, etc., and achieve the effects of good practicability and application prospects, simple process and low cost

Inactive Publication Date: 2013-04-24
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since gaseous mercury pollution control is a difficult point in the field of environmental protection research, there is still a lack of adsorbent materials for gaseous elemental mercury, especially high-activity and large-capacity adsorbent materials that meet the above requirements have not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: in a 100 mL volumetric flask, add respectively the silver nitrate of 0.068 g and the trisodium citrate of 0.1764 g, transfer in the beaker after constant volume with deionized water, silver nitrate and trisodium citrate mol ratio are 2:3. Stir the above solution with a magnetic stirrer at a stirring speed of 200 r / min, and slowly drop in 4 mL (200 mmol / L) of freshly prepared NaBH at a rate of 1 mL / min. 4 solution, and continued to stir for 5 min to obtain nano-silver modified colloidal solution. Add 0.2g of clean gauze to the nano-silver modified colloid solution, and keep stirring and soaking the gauze for 6 hours at a rotating speed of 50-80 r / min, then take out the gauze, filter and wash it, and then dry it at a drying temperature of 65°C. Drying under the same conditions for 7 hours can obtain a nano-modified material for efficiently adsorbing gaseous element mercury.

Embodiment 2

[0022] Embodiment 2: in a 100 mL volumetric flask, add the silver nitrate of 0.051 g and the trisodium citrate of 0.1764 g respectively, transfer in the beaker after constant volume with deionized water, silver nitrate and trisodium citrate mol ratio are 1:2. Stir the above solution with a magnetic stirrer at a stirring speed of 200 r / min, and slowly drop in 3 mL (500 mmol / L) of freshly prepared NaBH at a rate of 1 mL / min. 4 solution, and continued to stir for 5 min to obtain nano-silver modified colloidal solution. Add 0.25g of clean gauze to the nano-silver modified colloid solution, and keep stirring and soaking the gauze for 6 hours at a rotating speed of 50-80 r / min, then take out the gauze, filter and wash it, and then dry it at a temperature of 70°C. Drying under the same conditions for 6.5 hours can obtain a nano-modified material for efficiently adsorbing gaseous element mercury.

Embodiment 3

[0023] Embodiment 3: in a 100 mL volumetric flask, add the silver nitrate of 0.034 g and the trisodium citrate of 0.1764 g respectively, transfer in the beaker after constant volume with deionized water, silver nitrate and trisodium citrate mol ratio are 1:3. Stir the above solution with a magnetic stirrer at a stirring speed of 200 r / min, and slowly drop in 2 mL (1 mol / L) of freshly prepared NaBH at a rate of 1 mL / min. 4 solution, and continued to stir for 5 min to obtain nano-silver modified colloidal solution. Add 0.3g of clean gauze to the nano-silver modified colloid solution, and keep stirring and soaking the gauze for 6 hours at a rotating speed of 50-80 r / min, then take out the gauze, filter and wash it, and then dry it at a temperature of 75°C. Drying under the same conditions for 6 hours can obtain a nano-modified material for efficiently adsorbing gaseous element mercury.

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Abstract

The invention discloses a nano modified material for efficiently adsorbing a gaseous element mercury and a preparation method thereof. The nano modified material is obtained from a common gauze as a base body and modified by a nano-silver modified colloidal solution. The invention also provides a preparation method of the nano modified material for efficiently adsorbing the gaseous element mercury. The product disclosed by the invention is wide in material source, soft in texture, low in cost, and high in adsorption capacity; the gas flow rate is 500mL / min at room temperature; the adsorption material is 0.2g; the concentration of a gas-phase mercury inlet is 44mug / m<3>; and the adsorption capacity can be up to over 1.2mg / g. The product disclosed by the invention can be used for package and transportation of a mercury lamp or medical equipment and fabrication of a professional risk protection device, and has good practicability and application prospect. The preparation method of the nano modified material disclosed by the invention is simple in process, short in process period, and convenient to carry out.

Description

technical field [0001] The invention relates to an adsorption material, in particular to a nano-modified material and a preparation method for efficiently adsorbing gaseous element mercury. Background technique [0002] Mercury is one of the most toxic elements in metals and is widely distributed in the environment. With the development of industry, mercury is widely used in chlor-alkali industry, plastic industry, electrical industry, paint industry, as well as pesticide, paper and medical and health industries. Mercury-containing waste water, waste gas and waste residue produced in the industrial production process using mercury as raw material have seriously polluted the environment. In daily life, mercury pollution from 1.2 mg / m3 to 8.5 mg / m3 can lead to acute mercury poisoning. Although acute mercury poisoning is uncommon, potential mercury contamination is long-term and widespread. There are many common sources of mercury pollution in daily life, mainly mercury-cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30B01D53/02
Inventor 苑春刚翟文华王金从于水新
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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